package com.example.config;

import com.example.mapper.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Configuration
@Slf4j
public class WebMvcConfig extends WebMvcConfigurationSupport {
    @Override
    //扩展MVC的消息转换器
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("扩展消息转换器~");
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        //注册JacksonObjectMapper到MVC的消息转换器中
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        converters.add(0, messageConverter);
    }
}
